A vulnerability in the built-in node drivers of Rancher could allow an authenticated, remote attacker to gain unauthorized access on a targeted system.
The vulnerability exists because the built-in node drivers of the affected software have a file path option that allows an affected system to read arbitrary files, such as /root/.kube/config. An attacker with access to the targeted system could exploit this vulnerability to access sensitive information, which the attacker could use to gain unauthorized access to the management plane of the affected software. A successful exploit could be used to conduct further attacks.
Rancher has confirmed the vulnerability and released software updates.
To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
Rancher has released a security announcement at the following link: CVE-2019-12274
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.